Machine for punching horseshoe-nails



I. O. TATE. Machine for Punching Horseshoe-Nails.

No. 226,208. Patented April 6,1880.

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N. PEIERS. PHOTO-LITHOGRAPHER. wAsmNGTON. D. c.

UNITED STATES ISAAC C. TATE, OF LONDON, CONNECTICUT.

MACHINE FOR PUNCHING HORSESHOE-NAILS.

SPECIFICATION forming part of Letters Patent No. 226,208, dated April 6, 1880.

Application filed January 12, 1880.

To all whom it may concern:

Be it known that I, ISAAC C. TATE, a citizen of the United States, residing at New London, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Machines for Punching Horseshoe-Nails; and Ido hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Heretofore iron for horseshoe-nails has been rolled with the edges thick and central part thin, so that the nails could be cut out with punch and die, heads and points,from said bar; but after such cutting it has been necessary to remove the rough scale-marks of the iron and taper, temper, and finish each nail separately. Iron has also been rolled while hot with i11- dent-ations corresponding to the face form of the nails, which indented portions were subsequently punched out; butby this latter method the nails were left soft, and required to be subsequently tempered and finished.

The tempering of horseshoe-nailsisaccomplished by compressing and condensing the metal by punch and die or by hammering or rolling, and requires the employment of costly machinery. When the nail is subjected to this operation the temper is unequal, because the metal at the edges yields more readily than at the center, having lateral support; and it also impairs the form of the nail, which can only be restored by trimming.

To obviate the defects of themethod as above described, I patented an invention, as fully described in Letters Patent No. 189,586, granted to me on the 17th of April, 1877, in the practical operation of which a considerable waste is occasioned; and to reduce this waste is the object of my present invention, for which purpose it is carried out as follows: I use a vertically-movable punch-holder, which is to be attached to the vertically-movable gate or head of a suitable punching-machine, which punchholder is l'provided, first, with a pair of plating and tempering dies, inzthei jrear of which is arranged a pair of male nail-blank punches,

on each side of which, and in a line with said punches, is arranged apair ofnail -pointin g-finishing punches, combined with a stationary bedplate, a part of which directly beneath the tempering and tapering dies is smooth and plain. The other part, directly beneath the male nailblank punches, is provided with a pair of stationary female nail-blank dies. In the bed, heneath the said stationary female nail-blank dies, I arrange a laterallysliding die-holder, provided with a double pair of female pointing-finishing dies, into which the male nailblank punches force the nail-blanks in such a manner as to leave the heads of the nailblanks within the pointingfinishing dies and the clinch or point parts of the nailblanks on the top of the said dies. .The sliding die holder is then moved laterally until its pointing-finishing dies, which have the blanks within them, come directly under the pointing-finishing punches, where it remains stationary long enough to allow the corresponding set of pointing-finishing punches in the vertically-movable punch-holder to descend and cutout the finished nails, which drop through the said dies. In this position of the sliding die-holder its other pair of pointingfinishing dies are directly beneath the stationary female nail-blank dies in the bed-die, and have received a successive pair of nail-blan ks in the same manner as above described. The

punch-holder with its punches now ascends to allow the sliding die-holder to move laterally until it brings the female pointing-finishing dies with their nail-blanks directly beneath the opposite set of the pointing-finishing punches, where the same operation is performed, and so on.

The sliding die-holder is to be moved laterally by any suitable positive and intermediate mechanism from any moving part of the punching-machine.

If so required, suitable springs or equivalent devices may be arranged in connection with the female pointing-finishin g dies to retain the nail-blanks in their proper positions during the operation.

' If desired, the plating-punches may be operated in a vertical double-headed punchingpress holder separate from the blank-punches, but operated by the same shaft in connection with well-known feeding and guiding mechanism.

- In the accompanying drawings, Figure 1 represents a plan view of the invention. Fig. 2 represents a plan view, showing the punchholder removed. Fig. 3 is a plan view of the sliding die-holder. Fig. 4 is a longitudinal section on the line A B, shown in Fig. 1. Fig. 5 is a section on the line C D, shown in Fig. 1. Fig. 6 is a cross-section on the line E F, also shown in Fig. 1. Fig. 7 represents a plan View of the double-ribbed nail-plate. Fig. 8 is a plan view of the same, showing the form of blanks and waste on the points between the heads. Fig. 9 is a cross-section on the line Gr H,shown in Fig. 8. Fig. 10 is a plan view of the nail-blank, the dark spaces on which represent the clipping or waste in pointing. Fig. 11 is a plan view of the finished nail, and Fig. 12 is a longitudinal section of a pointed and finished nail.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

ais the punch-h older, provided with the tempering and tapering dies 1) I) and male nailblank punches c 0, as and for the purpose described. d d d d are the pointing-finishing punches arranged on two opposite sides of and in a line with the male nail-blank punches 00, as and for the purpose set forth. 6 is the bed-die, having smooth upper part,'e, directly beneath the tempering and tapering dies 1) b, and e e are female nailhlank dies, located directly underneath the male nail-blank punches 0 c, as and for the purpose specified. fis the sliding dieliolcler, provided with the female pointingfinishing (lies f f f f, arranged in pairs in a manner and for the purpose as set forth, and shown in the accompanying drawings. g g are suitable extensions on the sliding die-holder f, to which power for imparting a reciprocating motion to the die-holder is to be applied, for the purpose set forth.

h in Fig. 7 represents the double-ribbed nailplate before impressions are made on it.

5 in Fig. 8 represents the nail-plate as it is to be stamped and punched, and the black spaces 11 i represent't-he waste at the points of the nails.

11 i in Figs. 8 and 9 represent the depressions made in the nail-plate by the tempering and tapering dies, as and for the purpose set forth.

In Fig. 10, 7c represents the nail-blank after it is punched by the male nail-blank punches 0 c and before it is pointed and clipped by the poin tin gfinishin g punches d d d d. The black spaces 7t" 7: in said Fig. 10 represent the clipping at the point by the pointing-finishing 6o punches d d d d.

lin Figs. 11 and 12 represent the finished nail.

\Vhat I wish to secure by Letters Patent, and claim, is-- 1. In amachinefor punching horseshoenails,

the punch-holder a and its central male nailblank punches, c c, in combination with the female nail-blank dies 6 6" and the female slide-carrying dies f f, as and for the purpose set forth.

2. In a machinefor punching horseshoe-nails, the punch-holder a, with its central male nailblank punches, c 0, pointing-finishing punches d d d d, the bed-die 0, with its female nailblank dies 6 e, and the sliding die-holder f, with its female pointingfinishing dies f f f f", as and for the purpose described.

3. In a machine forpunching horseshoe-nails, the punch-holder a, with its central male nailblank punches, 0 c, pointing-finishing punches d d d d, and tapering and tempering dies 1) Z), the bed-die 6, with its female nail-blank dies 6 e, and the sliding die-holder f, with its female pointingfinishing dies f f f f, as and 8 5 for the purpose described.

' In testimony whereof I have affixed my signature in presence of two witnesses.

ISAAC O. TATE.

Witnesses ALBAN ANDREN, HENRY GHADBOURN. 

